1999 · Lexus300/GS 400
What the data shows
This 1999 Lexus GS 300 uses the long-lived 3.0-liter inline-six, but at 120,000 miles and 27 years old, timing-belt service, cooling-system plastics, suspension bushings, and electrical age faults matter more than mileage alone. Front lower ball-joint history also deserves attention on this generation.
Budget about $8,500 for deferred age and interval work, confirm the timing-belt record first, and inspect the front suspension and underside for leaks. The $5,000 asking price is slightly below the estimated private-party market midpoint.
At a Glance
What this guide surfacedthe replacement interval is due by time and mileage if records cannot document recent service
a 27-year-old car is more likely to need hoses, seals, bushings, and weatherstripping
the $5,000 asking price is below the estimated private-party midpoint
Reliability Outlook
Modeled risk by mileageDeal Score weighs the asking price against comparable listings, the title, and the repairs documented in this guide.
- Price 41% below market
- Unusually large discount — verify the listing is genuine
- 9 major issues
- 1 open safety recall
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Detailed findings, 12 items
Click any card for the full breakdown, repair cost, and what to check. Items already handled by the owner show as checked.
Reflects the open findings; items the owner handled are excluded.
Costly repairs, but not urgent to verify before you buy. Price them out and use them to negotiate.
Timing Belt Age and Wear
The rubber timing belt can crack, stretch, or lose teeth with age, allowing the camshafts to stop turning correctly. The 3.0-liter inline-six uses a timing belt, and a failure can leave the engine stopped and cause internal engine damage.
Cooling Hose and Radiator Aging
The plastic radiator tanks, coolant hoses, and seals can become brittle and leak, leaving dried coolant residue or a sweet smell after driving. A small leak can turn into overheating and expensive engine damage if coolant is lost.
Power Steering Rack Leakage
The power-steering rack seals can seep fluid, leaving wetness on the rack or fluid accumulation near the inner tie-rod boots. Low fluid can make steering noisy and can eventually damage the pump.
Front Suspension Bushing Cracks
The front control-arm and stabilizer-bar bushings can crack or soften, producing clunks, wandering, or braking shimmy. The car may still track straight, but worn bushings reduce steering precision and accelerate uneven tire wear.
Valve Cover Gasket Seepage
The valve cover gasket can harden and seep oil around the cylinder-head perimeter and spark-plug wells. Oil in a plug well can cause a misfire, while oil dripping onto hot surfaces can create a burning-oil smell.
Window Regulator Failure
The power-window regulator cables and plastic guides can bind or break, leaving a window stuck, crooked, or dropping into the door. The motor may still be heard running while the glass does not move.
Air Conditioning Compressor Wear
The air-conditioning compressor clutch or internal compressor can wear, causing weak cooling, rattling, or a clutch that fails to engage. Refrigerant leakage elsewhere can produce the same symptom, so compressor replacement should not be assumed from warm air alone.
Brake Caliper and Hose Aging
Old flexible brake hoses can swell internally and caliper slide pins can seize, causing a dragging wheel, uneven pad wear, or pulling under braking. A hot wheel or burning brake smell after a short drive is a warning sign.
Automatic Transmission Shift Solenoid Wear
The five-speed automatic transmission can develop delayed engagement, harsh shifts, or slipping as solenoids, valve-body passages, and aged fluid deteriorate. A flare between gears or a delayed reverse engagement is more concerning than a simple firm shift.
Minor wear typical for the car’s age. Not worth negotiating over, but good to track as an owner.
Instrument Display Pixel Loss
The instrument-cluster or climate-control display can lose pixels or become dim, making portions of the readout unreadable. This is an age-related electronic display failure rather than an engine fault.
Door Lock Actuator Failure
A door-lock actuator can weaken or stop moving its lock, leaving one door unlocked or requiring repeated switch presses. The central locking system may work on the other doors while one latch remains affected.
Rubber Boot and Seal Deterioration
The constant-velocity joint boots, steering boots, suspension dust boots, and door weather seals can harden, crack, or split with age. Torn boots allow grease out or dirt in, while failed weather seals permit wind noise and water entry.
Every finding still open carries a question worth asking. Copy them as one message, already ordered by severity. Anything you have marked above drops off on its own.
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Price & negotiation
BetaBased on comparable listings and the repairs you can document. A starting point for what this car should cost.
Discounts this deep are sometimes real, but they are also the classic pattern for scam listings, undisclosed damage, and title problems. Before paying anything: see the title in hand, check the VIN matches the car and the paperwork, and walk away from any seller who won't meet in person or asks for a deposit up front.
Price breakdown
What it costs, and when
Verify now
Critical and major items to confirm first.
Possible year-one expense
Caution items with repair-cost context.
Each range is what that one item costs if it turns out to be present. Not every item will apply to this car, so they do not add up to a bill. Verify with a mechanic.
Asking is $5,000 against a typical $8,500 for this car and mileage. The work is the difference, not the sticker.
Negotiate your offer
Asking is about 41% below the market estimate, so there may be less room to move. The documented repairs below are still relevant to raise.
- Documented critical/major repairs of $4,350–$12,700 you can point to.
- Strongest items to raise first: Power Steering Rack Leakage, Timing Belt Age and Wear.
Pricing is in beta. The market estimate comes from research models and can be off by thousands on the same car, so check recent local listings before you rely on it. This is information to help you research, not a professional inspection, an appraisal, or financial advice.
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Recalls & safety
NHTSA crash-test ratings and recall data for this make, model, and year. Check recall status with your VIN before buying.
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In-person inspection
12 things to check before you buy
9 major and 3 caution findings, turned into a walkthrough for the driveway. Try it on this sample.
Before you leave: Ask the seller not to start or move the car before you arrive. A sales-ready car has usually been warmed up, and a warm engine hides the startup smoke, rattles and rough idle that the first section is built around.
01Underneath2
Get low with the flashlight while everything is still cool. Look for drips and oily residue, feel inside the tailpipe for black greasy soot, and check the rubber CV boots at the ends of the axles for splits throwing grease. Kinks in the frame rails, fresh weld marks, and new undercoating on an old car all point at repaired collision damage.
02Interior & Electronics3
Turn the key to accessory and then on, before starting. Confirm every warning light comes on and then clears, and test the windows, locks, climate fan, infotainment, and seats while the engine is off. Smell for damp, lift the mats to feel for wet carpet, and compare pedal rubber wear against the odometer.
03Engine & Systems3
Before the first start: pull the oil dipstick and look for a milky film, check the coolant for oil or rust, squeeze the radiator hoses for hard or mushy spots, and note the battery date. Once warm: confirm the cooling fans cycle, listen for belt noise, look for fresh seepage that was not there cold, and check that the A/C blows cold.
04Test Drive3
Drive a route with stops, a hill, and some open road. Feel for shift quality, clutch or torque-converter behaviour, brakes that pull or pulse, steering play, and any noise that changes with speed or steering angle.
05Documentation1
Match the VIN across the title, dash, and door jamb. On a dealer lot, read the Buyers Guide sticker: it states whether the car carries a warranty or is sold as is, and as is means every repair after the sale is yours. Review service records and recall history, then run an OBD-II scan for stored and pending codes.
Everything on this list is what you can see standing next to the car. A shop on a lift sees the rest, and a written pre-purchase inspection listing parts and labor is what a seller has to answer to. Budget roughly $100 to $150 at an ASE-certified shop.
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